NanaZip: Heap out-of-bounds write in NanaZip UFS directory parser

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0.

Problem type

CWE-787: Out-of-bounds Write

Affected products

M2Team

NanaZip

>= 5.0.1250.0, < 6.0.1698.0 - AFFECTED

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-44wh-7gc3-w936

https://github.com/M2Team/NanaZip/security/advisories/GHSA-44wh-7gc3-w936

x_refsource_CONFIRM

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-44215

Click to expand

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    "assignerShortName": "GitHub_M",
    "dateUpdated": "2026-05-12T19:23:43.798Z",
    "dateReserved": "2026-05-05T15:13:47.572Z",
    "datePublished": "2026-05-12T19:23:43.798Z",
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        "dateUpdated": "2026-05-12T19:23:43.798Z"
      },
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          "value": "NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0."
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